/*
 * Copyright 2008 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package blms.repository.inmemory;

import java.io.Serializable;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

import blms.domain.Identifiable;
import blms.repository.Repository;

/**
 * Simple in-memory repository of objects. This implementation may be used to
 * load and store objects either in memory.
 * 
 * @see Repository
 * 
 * @author João Arthur
 * @author Jonhnny Weslley
 * @author Thiago Emmanuel
 * @version 1.00, 21/04/2008
 * @since 1.0
 */
public class InMemoryRepository<E extends Identifiable> implements
		Repository<E> {

	protected final Map<Serializable, E> entities = new HashMap<Serializable, E>();

	/*
	 * (non-Javadoc)
	 * 
	 * @see blms.repository.Repository#add(blms.domain.Identifiable)
	 */
	public void add(final E entity) {
		entities.put(entity.getId(), entity);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see blms.repository.Repository#update(blms.domain.Identifiable)
	 */
	public void update(final E entity) {
		entities.put(entity.getId(), entity);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see blms.repository.Repository#contains(java.io.Serializable)
	 */
	public boolean contains(final Serializable id) {
		return entities.containsKey(id);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see blms.repository.Repository#get(java.io.Serializable)
	 */
	public E get(final Serializable id) {
		return entities.get(id);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see blms.repository.Repository#getAll()
	 */
	public Collection<E> getAll() {
		return entities.values();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see blms.repository.Repository#remove(blms.domain.Identifiable)
	 */
	public void remove(final E entity) {
		entities.remove(entity.getId());
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see blms.repository.Repository#removeAll()
	 */
	public void removeAll() {
		entities.clear();
	}

}
